What Would You Expect If a Researcher Injected Substance P

What would you expect if a researcher injected substance P into an animal's spinal cord?

A) The animal would be paralyzed.
B) The animal would show indications of pain in the part of the body that sends information to that section of the spinal cord.
C) The animal would show indications of pain in the part of the spinal cord where the substance was injected.
D) The animal would show signs of aggression.